Color: | Hard grey metal Steel grey, lustrous, hard, brittle metal Alpha is body centered cubic; beta is cubic; delta is body centered cubic. Gamma or electrolytic manganese is face centered cubic; when stabilized at room temp it is face-centered tetragonal. Manganese obtained by distillation of crude metal is whitish-gray with silvery crystalline fracture. Electro-deposited metal is silvery white, hard, and brittle. |